/*
* Private static function to set the parent window of a submenu and all
* of its submenus
*/
static void fghSetMenuParentWindow( SFG_Window *window, SFG_Menu *menu )
{
SFG_MenuEntry *menuEntry;
menu->ParentWindow = window;
for( menuEntry = ( SFG_MenuEntry * )menu->Entries.First;
menuEntry;
menuEntry = ( SFG_MenuEntry * )menuEntry->Node.Next )
if( menuEntry->SubMenu )
fghSetMenuParentWindow( window, menuEntry->SubMenu );
}
/*
* Activates a menu pointed by the function argument
*/
static void fghActivateMenu( SFG_Window* window, int button )
{
int max_x, max_y;
/* We'll be referencing this menu a lot, so remember its address: */
SFG_Menu* menu = window->Menu[ button ];
SFG_Window* current_window = fgStructure.CurrentWindow;
/* If the menu is already active in another window, deactivate it there */
if ( menu->ParentWindow )
menu->ParentWindow->ActiveMenu = NULL ;
/* Mark the menu as active, so that it gets displayed: */
window->ActiveMenu = menu;
menu->IsActive = GL_TRUE;
fghSetMenuParentWindow ( window, menu );
fgState.ActiveMenus++;
/* Set up the initial menu position now: */
fghGetVMaxExtent(menu->ParentWindow, &max_x, &max_y);
fgSetWindow( window );
menu->X = window->State.MouseX + glutGet( GLUT_WINDOW_X );
menu->Y = window->State.MouseY + glutGet( GLUT_WINDOW_Y );
if( menu->X + menu->Width > max_x )
menu->X -=menu->Width;
if( menu->Y + menu->Height > max_y )
{
menu->Y -=menu->Height;
if( menu->Y < 0 )
menu->Y = 0;
}
menu->Window->State.MouseX =
window->State.MouseX + glutGet( GLUT_WINDOW_X ) - menu->X;
menu->Window->State.MouseY =
window->State.MouseY + glutGet( GLUT_WINDOW_Y ) - menu->Y;
fgSetWindow( menu->Window );
glutPositionWindow( menu->X, menu->Y );
glutReshapeWindow( menu->Width, menu->Height );
glutPopWindow( );
glutShowWindow( );
menu->Window->ActiveMenu = menu;
fghCheckMenuStatus( menu );
fgSetWindow( current_window );
}
/*
* Deactivates a menu pointed by the function argument.
*/
void fgDeactivateMenu( SFG_Window *window )
{
SFG_Window *parent_window = NULL;
/* Check if there is an active menu attached to this window... */
SFG_Menu* menu = window->ActiveMenu;
SFG_MenuEntry *menuEntry;
/* Did we find an active window? */
freeglut_return_if_fail( menu );
parent_window = menu->ParentWindow;
/* Hide the present menu's window */
fgSetWindow( menu->Window );
glutHideWindow( );
/* Forget about having that menu active anymore, now: */
menu->Window->ActiveMenu = NULL;
menu->ParentWindow->ActiveMenu = NULL;
fghSetMenuParentWindow ( NULL, menu );
menu->IsActive = GL_FALSE;
menu->ActiveEntry = NULL;
fgState.ActiveMenus--;
/* Hide all submenu windows, and the root menu's window. */
for ( menuEntry = ( SFG_MenuEntry * )menu->Entries.First;
menuEntry;
menuEntry = ( SFG_MenuEntry * )menuEntry->Node.Next )
{
menuEntry->IsActive = GL_FALSE;
/* Is that an active submenu by any case? */
if( menuEntry->SubMenu )
fghDeactivateSubMenu( menuEntry );
}
fgSetWindow ( parent_window ) ;
}
/*
* Deactivates a menu pointed by the function argument.
*/
void fgDeactivateMenu( SFG_Window *window )
{
SFG_Window *parent_window = NULL;
SFG_Menu* menu;
SFG_MenuEntry *menuEntry;
/* Did we find an active window? */
freeglut_return_if_fail( window );
/* Check if there is an active menu attached to this window... */
menu = window->ActiveMenu;
freeglut_return_if_fail( menu );
parent_window = menu->ParentWindow;
/* Hide the present menu's window */
fgSetWindow( menu->Window );
glutHideWindow( );
/* Forget about having that menu active anymore, now: */
menu->Window->ActiveMenu = NULL;
menu->ParentWindow->ActiveMenu = NULL;
fghSetMenuParentWindow ( NULL, menu );
menu->IsActive = GL_FALSE;
menu->ActiveEntry = NULL;
fgState.ActiveMenus--;
/* Hide all submenu windows, and the root menu's window. */
for ( menuEntry = ( SFG_MenuEntry * )menu->Entries.First;
menuEntry;
menuEntry = ( SFG_MenuEntry * )menuEntry->Node.Next )
{
menuEntry->IsActive = GL_FALSE;
/* Is that an active submenu by any chance? */
if( menuEntry->SubMenu )
fghDeactivateSubMenu( menuEntry );
}
fgSetWindow ( parent_window ) ;
/* Menu status callback */
if (fgState.MenuStateCallback || fgState.MenuStatusCallback)
{
fgStructure.CurrentMenu = menu;
fgStructure.CurrentWindow = parent_window;
if (fgState.MenuStateCallback)
fgState.MenuStateCallback(GLUT_MENU_NOT_IN_USE);
if (fgState.MenuStatusCallback)
{
/* Get cursor position on screen and convert to relative to parent_window's client area */
SFG_XYUse mouse_pos;
fghGetCursorPos(&mouse_pos);
mouse_pos.X -= glutGet( GLUT_WINDOW_X );
mouse_pos.Y -= glutGet( GLUT_WINDOW_Y );
fgState.MenuStatusCallback(GLUT_MENU_NOT_IN_USE, mouse_pos.X, mouse_pos.Y);
}
}
}
/*
* Activates a menu pointed by the function argument
*/
static void fghActivateMenu( SFG_Window* window, int button )
{
int max_x, max_y;
SFG_XYUse mouse_pos;
/* We'll be referencing this menu a lot, so remember its address: */
SFG_Menu* menu = window->Menu[ button ];
SFG_Window* current_window = fgStructure.CurrentWindow;
/* If the menu is already active in another window, deactivate it (and any submenus) there */
if ( menu->ParentWindow )
fgDeactivateMenu(menu->ParentWindow);
/* Mark the menu as active, so that it gets displayed: */
window->ActiveMenu = menu;
menu->IsActive = GL_TRUE;
fghSetMenuParentWindow ( window, menu );
fgState.ActiveMenus++;
/* Set up the initial menu position now: */
fghGetVMaxExtent(menu->ParentWindow, &max_x, &max_y);
fgSetWindow( window );
/* get mouse position on screen (window->State.MouseX and window->State.MouseY
* are relative to client area origin), and not easy to correct given that
* glutGet( GLUT_WINDOW_X ) and glutGet( GLUT_WINDOW_Y ) return relative to parent
* origin when looking at a child window
* for parent windows: window->State.MouseX + glutGet( GLUT_WINDOW_X ) == mouse_pos.X
*/
fghGetCursorPos(&mouse_pos);
menu->X = mouse_pos.X;
menu->Y = mouse_pos.Y;
/* Make sure the whole menu is on the screen */
if( menu->X + menu->Width > max_x )
menu->X -=menu->Width;
if( menu->Y + menu->Height > max_y )
{
menu->Y -=menu->Height;
if( menu->Y < 0 )
menu->Y = 0;
}
/* Set position of mouse relative to top-left menu in menu's window state (could as well set 0 at creation time...) */
menu->Window->State.MouseX = mouse_pos.X - menu->X;
menu->Window->State.MouseY = mouse_pos.Y - menu->Y;
/* Menu status callback */
if (fgState.MenuStateCallback || fgState.MenuStatusCallback)
{
fgStructure.CurrentMenu = menu;
fgStructure.CurrentWindow = window;
if (fgState.MenuStateCallback)
fgState.MenuStateCallback(GLUT_MENU_IN_USE);
if (fgState.MenuStatusCallback)
/* window->State.MouseX and window->State.MouseY are relative to client area origin, as needed */
fgState.MenuStatusCallback(GLUT_MENU_IN_USE, window->State.MouseX, window->State.MouseY);
}
fgSetWindow( menu->Window );
glutPositionWindow( menu->X, menu->Y );
glutReshapeWindow( menu->Width, menu->Height );
glutPopWindow( );
glutShowWindow( );
menu->Window->ActiveMenu = menu;
fghCheckMenuStatus( menu );
fgSetWindow( current_window );
}
void fgDeactivateMenu( SFG_Window *window )
{
SFG_Window *parent_window = NULL;
SFG_Menu* menu;
SFG_MenuEntry *menuEntry;
/* Did we find an active window? */
freeglut_return_if_fail( window );
/* Check if there is an active menu attached to this window... */
menu = window->ActiveMenu;
freeglut_return_if_fail( menu );
/* Check if we are already deactivating this menu, abort in that case (glutHideWindow below can cause this function to be called again on the same menu..) */
if (menu==menuDeactivating)
return;
menuDeactivating = menu;
parent_window = menu->ParentWindow;
/* Hide the present menu's window */
fgPlatformHideWindow( menu->Window );
/* Forget about having that menu active anymore, now: */
menu->Window->ActiveMenu = NULL;
menu->ParentWindow->ActiveMenu = NULL;
fghSetMenuParentWindow ( NULL, menu );
menu->IsActive = GL_FALSE;
menu->ActiveEntry = NULL;
fgState.ActiveMenus--;
/* Hide all submenu windows, and the root menu's window. */
for ( menuEntry = ( SFG_MenuEntry * )menu->Entries.First;
menuEntry;
menuEntry = ( SFG_MenuEntry * )menuEntry->Node.Next )
{
menuEntry->IsActive = GL_FALSE;
/* Is that an active submenu by any chance? */
if( menuEntry->SubMenu )
fghDeactivateSubMenu( menuEntry );
}
/* Done deactivating menu */
menuDeactivating = NULL;
/* Menu status callback */
if (fgState.MenuStateCallback || fgState.MenuStatusCallback)
{
fgStructure.CurrentMenu = menu;
fgStructure.CurrentWindow = parent_window;
if (fgState.MenuStateCallback)
fgState.MenuStateCallback(GLUT_MENU_NOT_IN_USE);
if (fgState.MenuStatusCallback)
{
/* Get cursor position relative to parent_window's client area */
SFG_XYUse mouse_pos;
fghPlatformGetCursorPos(parent_window, GL_TRUE, &mouse_pos);
fgState.MenuStatusCallback(GLUT_MENU_NOT_IN_USE, mouse_pos.X, mouse_pos.Y);
}
}
}
